Radon monitoring

Radon is a naturally occurring radioactive gas which you cannot see or smell. It is found in rocks and soils across the UK and it is present in all buildings, although usually at very low levels. Research has suggested that there is a link between exposure to radon and an increased risk of lung cancer.

The amount of radon is measured in becquerels per cubic metre of air (Bq/m3):

  • the average level in UK homes is 20 Bq/m3
  • levels below 100 Bq/m3 are considered to be low risk, but the risk increases as the radon level increases
  • if levels in a property exceed 200 Bq/m3 it's recommended that you take action to reduce them

You can find out more information on radon levels where you live or order a home measurement pack on the:

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Page last updated: 06 May 2021

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